diff options
Diffstat (limited to 'net/netfilter/ipvs/ip_vs_xmit.c')
| -rw-r--r-- | net/netfilter/ipvs/ip_vs_xmit.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/net/netfilter/ipvs/ip_vs_xmit.c b/net/netfilter/ipvs/ip_vs_xmit.c index 02b078e11cf3..21e1a5e9b9d3 100644 --- a/net/netfilter/ipvs/ip_vs_xmit.c +++ b/net/netfilter/ipvs/ip_vs_xmit.c @@ -28,6 +28,7 @@ #include <net/ip6_route.h> #include <linux/icmpv6.h> #include <linux/netfilter.h> +#include <net/netfilter/nf_conntrack.h> #include <linux/netfilter_ipv4.h> #include <net/ip_vs.h> @@ -348,6 +349,30 @@ ip_vs_bypass_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, } #endif +static void +ip_vs_update_conntrack(struct sk_buff *skb, struct ip_vs_conn *cp) +{ + struct nf_conn *ct = (struct nf_conn *)skb->nfct; + struct nf_conntrack_tuple new_tuple; + + if (ct == NULL || nf_ct_is_untracked(ct) || nf_ct_is_confirmed(ct)) + return; + + /* + * The connection is not yet in the hashtable, so we update it. + * CIP->VIP will remain the same, so leave the tuple in + * IP_CT_DIR_ORIGINAL untouched. When the reply comes back from the + * real-server we will see RIP->DIP. + */ + new_tuple = ct->tuplehash[IP_CT_DIR_REPLY].tuple; + new_tuple.src.u3 = cp->daddr; + /* + * This will also take care of UDP and other protocols. + */ + new_tuple.src.u.tcp.port = cp->dport; + nf_conntrack_alter_reply(ct, &new_tuple); +} + /* * NAT transmitter (only for outside-to-inside nat forwarding) * Not used for related ICMP @@ -403,6 +428,8 @@ ip_vs_nat_xmit(struct sk_buff *skb, struct ip_vs_conn *cp, IP_VS_DBG_PKT(10, pp, skb, 0, "After DNAT"); + ip_vs_update_conntrack(skb, cp); + /* FIXME: when application helper enlarges the packet and the length is larger than the MTU of outgoing device, there will be still MTU problem. */ @@ -479,6 +506,8 @@ ip_vs_nat_xmit_v6(struct sk_buff *skb, struct ip_vs_conn *cp, IP_VS_DBG_PKT(10, pp, skb, 0, "After DNAT"); + ip_vs_update_conntrack(skb, cp); + /* FIXME: when application helper enlarges the packet and the length is larger than the MTU of outgoing device, there will be still MTU problem. */ |